This 339.3-mile journey from Unicoi, TN to Clarksville, TN is designed for efficiency, taking approximately 6 hours and 18 minutes. Primarily utilizing I-40 and I-24, this highway-focused drive is achievable in a single day, making it a practical option for a quick trip. With a fuel cost estimated around $53, it's an economical way to travel across Tennessee. The route maintains a high percentage of highway driving, offering a straightforward transit experience. Given its length and duration, planning for a single-day transit is recommended, though you can certainly adjust your pace as needed.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
169.6 miles from Unicoi, TN
A natural place for your longest stop of the day
, about 3h 8m into the drive
.
Main Roads
Road
Distance
Duration
I 40
209.8 mi
3h 49m
I 81
57.1 mi
1h 1m
I 24
36.4 mi
40m
James H. Quillen Parkway
23 mi
27m
Madison Street
4.7 mi
8m
TN 76
3.4 mi
3m
Downtown Loop
2.3 mi
3m
Unicoi Drive
0.7 mi
1m
Longest stretch:
I 40
— 209.8 mi, about 3h 49m
Turn-by-Turn Driving Directions
Step-by-step road directions between Unicoi, TN and Clarksville, TN.
1
Start on SR 173
0.7 mi·1 min·Unicoi Drive
2
Turn left onto SR 173
0.3 mi·30 sec·SR 173
3
Take the ramp
0.3 mi·45 sec
4
Merge onto I 26; US 19W; US 23
23 mi·27 min·James H. Quillen Parkway
5
Take the exit
0.2 mi·37 sec
Exit 8AToward I 81 South: Knoxville
6
Merge onto I 81
56 mi·1 hr·I 81
7
Continue on I 81
0.7 mi·45 sec·I 81
Exit 1BToward I 40 West: Knoxville
8
Merge onto I 40
53 mi·59 min·I 40
Use the straight / slight right lanes.
9
Keep slight right at fork onto I 40
155 mi·2 hr 46 min·I 40
Toward NashvilleUse the straight / slight right lanes.
10
Keep slight right at fork onto I 40
2.1 mi·3 min·I 40
Exit 213BToward I 24 West, I 40 West: NashvilleUse the straight / slight right lanes.
11
Keep slight right at fork onto I 24
0.3 mi·28 sec·I 24
Exit 211Toward I 24 West: Clarksville, LouisvilleUse the slight right lane.
12
Merge onto I 24
2.3 mi·3 min·Downtown Loop
Use the straight / slight right lanes.
13
Continue on I 24
2.1 mi·2 min·I 24
Exit 46AToward I 24 West, I 65 North: Clarksville, LouisvilleUse the straight / slight left lanes.
14
Take the exit onto I 24
34 mi·36 min·I 24
Exit 88Toward I 24 West: ClarksvilleUse the slight left / straight lanes.
15
Take the exit
0.3 mi·40 sec
Toward TN 76
16
Keep slight left at fork
283 ft·9 sec
17
Continue on TN 76
3.4 mi·3 min·TN 76
18
Turn right onto US 41A
4.7 mi·8 min·Madison Street
Use the straight / left / right lanes.
19
Turn right onto US 41A
0.4 mi·44 sec·University Avenue
20
At end of road, turn left onto US 41A; SR 48
0.3 mi·45 sec·College Street
21
Turn left onto North 2nd Street
134 ft·2 sec·North 2nd Street
Use the straight / left lanes.
22
Arrive at destination
North 2nd Street
Trip Plan
To make the most of this 6-hour, 18-minute drive, consider an early morning departure from Unicoi to avoid any potential traffic. With only one recommended stop, you have flexibility in pacing, but be mindful of the longest stretch of 209.8 miles on I-40, where you'll want to ensure you're fueled up beforehand. The estimated fuel cost of $53 is a good baseline for budgeting. Since this is a manageable one-day trip, you can adjust your rest stops as you feel comfortable, but keep an eye on your fuel gauge, especially before entering longer interstate segments.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 169.6 miles from Unicoi, TN, or about 3h 8m into the drive.
The longest continuous stretch on this route runs about 209.8 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 75 miles or 1h 24m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 169.6 miles or 3h 8m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 5h 6m
Traffic, exits, and arrival timing usually matter more near Clarksville, TN than in the middle of the route.
Before You Leave
+
Open the route before leaving Unicoi, TN so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Unicoi, TN
This is one driving day of about 339.3 miles and 6h 18m.
Your first comfortable stop window is around 75 miles from Unicoi, TN.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on I 40 for about 209.8 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 18
5 decision points cluster between mile 134.4 and 333.9 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
134.4 mi into trip|~2h 31m in|I 40
Keep slight right at fork onto I 40 toward Nashville
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward Nashville
9
289.3 mi into trip|~5h 17m in|I 40
Keep slight right at fork onto I 40 toward I 24 West, I 40 West: Nashville
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 213B
Toward I 24 West, I 40 West: Nashville
9
291.4 mi into trip|~5h 20m in|I 24
Keep slight right at fork onto I 24 toward I 24 West: Clarksville, Louisville
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 211
Toward I 24 West: Clarksville, Louisville
7
296.2 mi into trip|~5h 27m in|I 24
Take the exit onto I 24 toward I 24 West: Clarksville
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight left / straight lanes.
Exit 88
Toward I 24 West: Clarksville
6
333.9 mi into trip|~6h 8m in|US 41A / Madison Street
Turn right onto US 41A / Madison Street
Lane positioning matters here
Use the straight / left / right lanes.
Fuel & Cost
Regular Gas
$53.05 one way
$106.09 round trip
$3.97/gal25.4 MPG avg119 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$58.24
$116.48
premium
$4.89
$65.30
$130.59
diesel
$5.61
$74.91
$149.83
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$53
Meals
$25–$50
Total
$78–$103
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 118.7 kg one way.
Prices: EIA weekly data, 2026-04-13.
EV Charging Along Route
2 DC fast chargers
· Coverage: fair
Mercedes-Benz Charging Station
Kodak, Tennessee
Other
1 DCFC
Tesla Supercharger
Kodak, Tennessee
Tesla
1 DCFC
Other: 1
Tesla: 1
Station data from NREL Alternative Fuel Stations database.
Driving Electric?
About $36 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
101.8
1
$35.63
$16.29
Efficient EV
84.8
0
$29.69
$13.57
EV Truck/SUV
135.7
1
$47.50
$21.72
Gas CO2
119 kg
EV CO2
40 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 15, 2026
Origin
Unicoi, TN
Late night
in Unicoi on Sunday
Local time
4:14 AM
EDT
Current temp
65°F
Unavailable
Live forecast
Destination
Clarksville, TN
Late night
in Clarksville on Sunday
Local time
3:14 AM
CDT
Current temp
54°F
Unavailable
Live forecast
74°F
Clinton, TN
170 mi in
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
1 hour earlier
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
11 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
6h 18m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Stones River National Battlefield
National Battlefield
The Battle of Stones River began on the last day of 1862 and became one of the bloodiest conflicts of the Civil War. The battle produced important military and political gains for the Union, and it ch...
22 mi from route
~54 min detour
Free
near mile 269.1
Ridge upon ridge of forest straddles the border between North Carolina and Tennessee in Great Smoky Mountains National Park. World renowned for its diversity of plant and animal life, the beauty of it...
27 mi from route
~68 min detour
Free
near mile 93.6
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a predominantly highway experience on this route, with 97% of the drive on major interstates like I-40 and I-81. The longest uninterrupted stretch you'll encounter is a significant 209.8 miles on I-40, so be prepared for extended periods of consistent speed. This profile suggests a drive focused on covering ground efficiently rather than a winding, scenic exploration. The character of the road remains largely consistent, emphasizing smooth, high-speed travel for the majority of the trip.
97% highway — fuel and pacing are the main things to plan.
22 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 209.8 mi on I 40.
How Hard Is This Drive?
10/10
This is a straightforward highway drive that stays mostly on I 40 and I 81. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 134.4 miles in near I 40.
Driving Effort10/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 18 significant decision points across 339.3 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 134.4 miles (I 40): Highway fork - watch signs carefully. Lane positioning matters here; at 289.3 miles (I 40): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 291.4 miles (I 24): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Unicoi, TN and Clarksville, TN, road signs point toward Nashville and Louisville.
Nashville
134.4 mi in|~2h 31m|via I 40
Louisville
291.4 mi in|~5h 20m|via I 24
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 6h 18m. Total distance: 339.3 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 18m drive, plan rest stops for pacing.
Frequently Asked Questions
The longest stretch is about 209.8 miles on I 40. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Clarksville, TN before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 134.4 miles (I 40): Highway fork - watch signs carefully. Lane positioning matters here; at 289.3 miles (I 40): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 291.4 miles (I 24): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Not recommended in a single day. At 6.3 hours each way, a round trip means 12.6 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Clarksville, TN before the return drive.
